Rubber Parts/Gasket/Seal 1,Material:Silicone,EPDM,NR,NBR,SBR,FPM ... :The same as your design. 3,Color:black etc. Rubber Parts/Gasket/Seal Item:PTFE/Teflon seal ring1. Material: Silicone, EPDM ... Shore A3. Size: The same as your design, drawing or sample.4. Color: Black, white, Transparent, gray, green, yellow, blue, red ...